Bonnet, J. A., P. Tirado Sulsona, and M. A. Lugo López. “Attempt to Reclaim With Chemicals a Salty Clay in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 33, no. 2 (April 1, 1949): 75–84. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12842.